I chose the 338 Rum because it has plenty of power for what I want to do. Shoot elk and deer to 1k give or take a little. I also thought it would be easier to reload. I know everyone says that resizing 300rum brass is no big deal, but its just one less thing I need to do. I will never shoot factory ammo so that's a push.
I have only shot two rounds out of the rifle so far. I miss calculated the OAL and the loads I loaded were jamed into the lands.
I started with 90g of retumbo, then 1/2g steps up to 93g, 300g SMK. But the 90g load was flatting the primers a little bit so I stopped. Both bullets were about 1/2"apart at 100 yards. Almost no recoil and it fits great. The MV was 2785 and 2812.
I have been working so much overtime at work I have not made it back to the range yet.

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When discussing caliber, Dead is dead and it’s not worth arguing about.